Mechanical equilibrium

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Force diagram shawin the forces actin on an object at rest on a surface. The normal force N is equal an opposite tae the gravitational force mg so the net force is zero. Consequently the object is in a state o static mechanical equilibrium.

A mechanical equilibrium is a state in which a momentum coordinate o a pairticle, rigid body, or dynamical seestem is conserved. Uisually this refers tae linear momentum.